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json: add macro for automatically defining a dispatcher for an enum

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This commit is contained in:
Lennart Poettering
2024-01-05 12:08:37 +01:00
parent 995389aac6
commit dda6629622
1 changed files with 22 additions and 0 deletions
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src/shared/json.h
+22
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@@ -428,6 +428,28 @@ assert_cc(sizeof(uint32_t) == sizeof(unsigned));
assert_cc(sizeof(int32_t) == sizeof(int));
#define json_dispatch_int json_dispatch_int32
#define JSON_DISPATCH_ENUM_DEFINE(name, type, func) \
int name(const char *n, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { \
type *c = ASSERT_PTR(userdata); \
\
assert(variant); \
\
if (json_variant_is_null(variant)) { \
*c = (type) -EINVAL; \
return 0; \
} \
\
if (!json_variant_is_string(variant)) \
return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(n)); \
\
type cc = func(json_variant_string(variant)); \
if (cc < 0) \
return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "Value of JSON field '%s' not recognized.", strna(n)); \
\
*c = cc; \
return 0; \
}
static inline int json_dispatch_level(JsonDispatchFlags flags) {
/* Did the user request no logging? If so, then never log higher than LOG_DEBUG. Also, if this is marked as